To illustrate the relationships for pages as listed in the post title, the following simple macro was used to check out page naming conventions. The process involved:1) new document, adding 3 pages to get a total of four. Keep default (original) names and order.2) run macro. The list shows the expected and unexpected. Index is just the order of things. Name and NameU are identical. ID...what's up with that???3) change the names of the pages, but keep the order. Run macro. This is the special case, happens only first time.Name and NameU update identically. Nothing else changes.4) change names a 2nd time. Run macro. Name updates, but NameU keeps its value. In fact, NameU will remain at this value unless code is used to specifically modify it.5) change the page order. Run macro. Name, NameU, and ID track with each other. Indexing stays unchanged. That is, Index 1 refers to whoever is on first. Thus, the "index" of a page will update depending upon where it is in the order.

Results of each macro run have been copied and pasted following the code.